Synonyms

Host

Sus (scrofa domestica)

Habitat

Stomach, Small intestine

Locality

Shillong (Meghalaya), Nongstoin (Meghalaya), Jowai (Meghalaya)

Description

Male

Body 10.0-14.0 mm in length, 0.33-
0.38 mm in maximum width. Tail coiled, with asymmetrical alae; right ala about twice as wide as
left. Caudal papillae four pairs, long, pedunculate; of these three pairs
pre-anal, one adanal; papillae on right side almost at same level, those on
left side placed irregularly, additional pair of pedunculate papillae present in
post-anal region; five pairs of post-anal small sessile papillae
present on prominent raised area of cuticle with serrated margin near
cloaca. Spicules unequal, dissimilar; left long, slender, finely pointed;
right shorter, stout, blunt.

Female

Body 17.0-22.0 mm in length,
0.30-0.53 mm in maximum width. Tail bluntly pointed. Vulva in front of middle of body, displaced
towards left side, opening just ventrally to lateral ala; constriction in
region of vulva present. Vagina at first running transversely between
cuticle and muscular layer of body wall, then posteriorly within body
cavity. Uterine branches opposed; posterior branch doubling forward at
distance of few millimeters, its ovary situated in oesophageal region;
anterior branch doubling back at similar distance as posterior branch from
its origin, its ovary lying in posterior region of body. Eggs oval, of
irregular outline, operculate at poles, embryonated, 0.041-0.045 x
0.022-0.024 mm.

Remarks

Only two species of the genus are so far represented in the suids of the
world. These, namely A. strongylina and A. dentata are
distinguished from each other mainly on the basis of the body length which
is up to 15 mm and 22 mm in males and females of the former species and up
to 35 mm and 55 mm, respectively in males and females of the latter
species. Due to the extreme coiled nature of the
posterior end the caudal structures in most of the male worms could not be
easily discerned.

In the description given by Baylis (1939) and Shoho and Machida (1979)
there is no mention of the triangular raised area of cuticle surrounding
the cloaca, as noticed in the male specimens under present investigation. The gubernaculum reported to be present by the latter authors could not be seen. However, in all other major respects the present observations are in accordance with that of Baylis (1939) and Shoho and Machida (1979).

Helminthological collections record

NEHU/Z - NM/7

References

Baylis, H. A. (1939) The Fauna of British India including Ceylon and Burma. Nematoda Vol. II (Filarioidea, Dioctophymoidea and Trichinelloidea). Originally published by Taylor and Francis, London (reprinted edition: Today